我正在尝试基于在 WPF 中用作模板的 FixedPage 元素导出一些数据，但我似乎在更新复选框的值时遇到了问题。奇怪的是我也在我的模板中使用了文本块和文本框，但是这些更新它们的内容没有问题。
所以……从一开始。我要导出的数据在一个名为 RepairStatement 的类中，它允许使用 printForm 函数打印到自定义 xps 文件。
public class RepairStatement
{
// Variables
public bool hasKulanz { get; set; }
public bool hasRepair { get; set; }
public Client client { get; set; }
/// <summary>
/// Export repair statement to XPS file.
/// </summary>
/// <param name="file">output xps file</param>
public void printForm(string file)
{
string printTemplateRepairStatementPath = "Print Templates\\RepairStatement.xaml";
// Define general purpose handlers to be used in browsing the print templates
FileStream fileStream;
if (!File.Exists(file))
{
FileStream newfile = File.Create(file);
newfile.Close();
}
// Check that all xaml templates exist
if (!File.Exists(printTemplateRepairStatementPath))
{
throw new ArgumentNullException(printTemplateRepairStatementPath,
"Repair Statement print template is not available. Check file source");
}
FixedDocument doc = new FixedDocument();
// A4 Standard: 8.27 x 11.69 inch; 96 dpi
Size documentSize = new Size(96 * 8.27, 96 * 11.69);
doc.DocumentPaginator.PageSize = documentSize;
// 1. Reparatur-Bericht
// a. Open the filestream
try
{
fileStream = new FileStream(printTemplateRepairStatementPath, FileMode.Open);
}
catch (Exception e)
{
throw new ArgumentNullException(LoginAgent.userSerializationPath,
"Repair Statement print template could not be open due to " + e.Message);
}
// b. Read the XAML tree
FixedPage fixedPage = XamlReader.Load(fileStream) as FixedPage;
// c. Set the data
(fixedPage.FindName("receiptAddress") as TextBox).Text = client.receiptAddress; // Works
(fixedPage.FindName("deliveryAddress") as TextBox).Text = client.deliveryAddress;// Works
(fixedPage.FindName("hasEndorser") as CheckBox).IsChecked = true; // Has no effect
// d. Set the page size
fixedPage.Width = doc.DocumentPaginator.PageSize.Width;
fixedPage.Height = doc.DocumentPaginator.PageSize.Height;
// Add to document
PageContent pageContent = new PageContent();
((IAddChild)pageContent).AddChild(fixedPage);
doc.Pages.Add(pageContent);
// Convert to XPS
XpsDocument xpsDocument = new XpsDocument(file, FileAccess.Write);
XpsDocumentWriter documentWriter = XpsDocument.CreateXpsDocumentWriter(xpsDocument);
documentWriter.Write(doc);
xpsDocument.Close();
}
}
我使用的 xaml 模板如下所示：
<FixedPage xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
Name="RepairStatementFixedPage"
Background="White"
Width="793.92" Height="1122.24" VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
<Border Name="bigPage" BorderThickness="1" BorderBrush="#FFCB9999" Width="793.92" Height="1122.24"
HorizontalAlignment="Center" VerticalAlignment="Center">
<Border Name="content" Margin="96, 96">
<DockPanel LastChildFill="False">
<Grid DockPanel.Dock="Top" Name="title">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="120" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="120" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="10" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Image Grid.Column="0" Grid.RowSpan="3" Width="120"
Source="/DesktopLibrarian;component/Content/lib-bg.jpg"
VerticalAlignment="Top" HorizontalAlignment="Left" />
<TextBlock Grid.Column="1" Grid.RowSpan="3" HorizontalAlignment="Center" VerticalAlignment="Bottom"
TextBlock.FontSize="23">
Reparaturbericht
</TextBlock>
<TextBlock Grid.Column="2" Grid.Row="0" Grid.RowSpan="3"
VerticalAlignment="Top" HorizontalAlignment="Right" Name="repairNumber">
TEST
</TextBlock>
</Grid>
<Border DockPanel.Dock="Top" Height="20" />
<Grid DockPanel.Dock="Top" Name="deviceInfo">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
</Grid>
<!-- Client information -->
<GroupBox DockPanel.Dock="Top" Header="Kundeninformationen">
<Grid Margin="3">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="130" />
<ColumnDefinition Width="3" />
<ColumnDefinition Width="110" />
<ColumnDefinition Width="8" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="8" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<!-- Name -->
<TextBlock Grid.Column="0" Grid.ColumnSpan="3" Grid.Row="0" Name="clientName"
TextBlock.FontWeight="Bold">
TEST
</TextBlock>
<!-- Phone Number -->
<TextBlock Grid.Column="0" Grid.Row="2">Telefonnummer:</TextBlock>
<TextBlock Grid.Column="2" Grid.Row="2" Name="phoneNumber">TEST</TextBlock>
<!-- Auftragsnummer -->
<TextBlock Grid.Column="0" Grid.Row="3">Auftragsnummer (RMA):</TextBlock>
<TextBlock Grid.Column="2" Grid.Row="3" Name="orderNumber">TEST</TextBlock>
<!-- Receipt Address -->
<TextBlock Grid.Column="4" Grid.Row="1">Rechnungsadresse:</TextBlock>
<TextBox Grid.Column="4" Grid.Row="2" Grid.RowSpan="2" Name="receiptAddress" BorderThickness="0"
AcceptsReturn="True" TextWrapping="Wrap">
TEST
</TextBox>
<!-- Delivery Address -->
<TextBlock Grid.Column="6" Grid.Row="1">Lieferadresse:</TextBlock>
<TextBox Grid.Column="6" Grid.Row="2" Grid.RowSpan="2" Name="deliveryAddress" BorderThickness="0"
AcceptsReturn="True" TextWrapping="Wrap">
TEST
</TextBox>
</Grid>
</GroupBox>
<Border DockPanel.Dock="Top" Height="20" />
<!-- Device information -->
<GroupBox DockPanel.Dock="Top" Header="Geräteinformationen">
<Grid Margin="3">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="90" />
<ColumnDefinition Width="3" />
<ColumnDefinition Width="150" />
<ColumnDefinition Width="8" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<!-- Model -->
<TextBlock Grid.Column="0" Grid.ColumnSpan="3" Grid.Row="0" Name="model" TextBlock.FontWeight="Bold">
TEST
</TextBlock>
<!-- Repair -->
<CheckBox Grid.Column="4" Grid.Row="1" Name="hasRepair">Reparatur</CheckBox>
<!-- Device has endorser -->
<CheckBox Grid.Column="4" Grid.Row="2" Name="hasEndorser">Endorsergerät</CheckBox>
</Grid>
</GroupBox>
</DockPanel>
</Border>
</Border>
问题出在 printForm 函数的这 3 行中：
// c. Set the data
(fixedPage.FindName("receiptAddress") as TextBox).Text = client.receiptAddress;
(fixedPage.FindName("deliveryAddress") as TextBox).Text = client.deliveryAddress;
(fixedPage.FindName("hasEndorser") as CheckBox).IsChecked = true;
前两行正常修改文本框的内容。我也可以毫无问题地修改 Textblocks 的内容，但无论我尝试做什么，复选框的值都不会改变。我认为这与 FixedPage 或 FixedDocument 有关，但我无法理解问题可能是什么。如果我在 XAML 中设置 IsChecked="True"，则复选框将在最终 xps 文档中显示为已选中，但同样我无法取消选中它。
任何关于可能出错的提示将不胜感激。如果您知道有关 FixedPage 和 FixedDocument 的良好教程或信息源，我也很想看看它们，因为到目前为止我找到的文档至少可以说是适度的。
谢谢！
更新：我还在此处的 msdn 论坛上问了这个问题，并得到了一些关于在导出到 xps 之前使用 Measure()、Arrange 和 updatelayout() 的提示。不幸的是，这个解决方案似乎不起作用。考虑到文本块和文本框元素的行为符合预期，我认为这将是一个遥远的目标，而我只有复选框有问题。
我决定做一个小项目来显示这个错误，这样你也可以自己做一些实验。你可以在这里找到它。
让我知道你是否想出办法：D